dmaengine: ep93xx: convert tasklets to use new tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <[e-mail]>
Signed-off-by: Allen Pais <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/dma/ep93xx_dma.c

···
 	spin_unlock_irqrestore(&edmac->lock, flags);
 }
 
-static void ep93xx_dma_tasklet(unsigned long data)
+static void ep93xx_dma_tasklet(struct tasklet_struct *t)
 {
-	struct ep93xx_dma_chan *edmac = (struct ep93xx_dma_chan *)data;
+	struct ep93xx_dma_chan *edmac = from_tasklet(edmac, t, tasklet);
 	struct ep93xx_dma_desc *desc, *d;
 	struct dmaengine_desc_callback cb;
 	LIST_HEAD(list);
···
 		INIT_LIST_HEAD(&edmac->active);
 		INIT_LIST_HEAD(&edmac->queue);
 		INIT_LIST_HEAD(&edmac->free_list);
-		tasklet_init(&edmac->tasklet, ep93xx_dma_tasklet,
-			     (unsigned long)edmac);
+		tasklet_setup(&edmac->tasklet, ep93xx_dma_tasklet);
 
 		list_add_tail(&edmac->chan.device_node,
 			      &dma_dev->channels);